Allow -verify directives to be filtered by preprocessing.

This is accomplished by making VerifyDiagnosticsConsumer a CommentHandler,
which then only reads the -verify directives that are actually in live
blocks of code. It also makes it simpler to handle -verify directives that
appear in header files, though we still have to manually reparse some files
depending on how they are generated.

This requires some test changes. In particular, all PCH tests now have their
-verify directives outside the "header" portion of the file, using the @line
syntax added in r159978. Other tests have been modified mostly to make it
clear what is being tested, and to prevent polluting the expected output with
the directives themselves.

Patch by Andy Gibbs! (with slight modifications)

The new Frontend/verify-* tests exercise the functionality of this commit,
as well as r159978, r159979, and r160053 (Andy's other -verify enhancements).

llvm-svn: 160068

1 files changed, 5 insertions, 1 deletions

diff --git a/clang/test/Modules/Inputs/Module.framework/Headers/Module.h b/clang/test/Modules/Inputs/Module.framework/Headers/Module.h
index 738b2221cbb..f8949848bd4 100644
--- a/clang/test/Modules/Inputs/Module.framework/Headers/Module.h
+++ b/clang/test/Modules/Inputs/Module.framework/Headers/Module.h
@@ -1,4 +1,8 @@
-// expected-warning{{umbrella header}}
+// expected-warning 0-1 {{umbrella header}}
+
+// FIXME: The "umbrella header" warning should be moved to a separate test.
+// This "0-1" is only here because the warning is only emitted when the
+// module is (otherwise) successfully included.
 
 #ifndef MODULE_H
 #define MODULE_H